My Herald did the same thing several years ago and it turned out that the
ring gear had just worn out. There were 2 place on the gear where the teeth
were very worn 180 degrees opposite of each other. I had to eventually
remove and replace. BTW, if you end up doing this, REPLACE THE CLUTCH while
your in there. Before the starter started free wheeling, once in a great
while it would jam. The first few times it did this I simply loosened the
top bolt of the starter and it popped loose. Later, when I obtained a
original drivers manuel, it addressed this problem, indicating that this
should be expected to happen once and a while and advised "to place the
vehicle in 3rd or 4th gear and gently rock the car to and fro" God love
the Brits!
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